Subaru WRX STI S209 Supplement Manual page 29

& Engine
Engine model
Engine type
Displacement cu-in (cc)
Bore 6 Stroke in (mm)
Compression ratio
Firing order
& Fuel
NOTE
The engine is designed to operate using unleaded gasoline.
Fuel
Fuel tank capacity
*1: If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not available, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be
used with no detriment to engine durability or driveability.
EJ25 (2.5 L, DOHC, turbo)
Horizontally opposed, liquid cooled 4 cylinder, 4-stroke petrol engine
150 (2,457)
3.92 6 3.11 (99.5 6 79.0)
8.2 : 1
1 – 3 – 2 – 4
93 AKI (98 RON) or higher*
15.9 US gal (60 liters, 13.2 Imp gal)
1
25